\begin{center}
\begin{tabular}{ll}
\hline 
Three-group classification  &
Contained occupations\tabularnewline
\hline 
\hline 
Cognitive non-routine  &
Managers\tabularnewline
 &
Professionals\tabularnewline
 &
Technicians\tabularnewline
\hline 
Routine  &
Sales\tabularnewline
 &
Office and admin\tabularnewline
 &
Production, craft and repair\tabularnewline
 &
Operators, fabricators and laborers\tabularnewline
\hline 
Manual non-routine  &
Protective service \tabularnewline
 &
Food prep, buildings and grounds, cleaning\tabularnewline
 &
Personal care and personal services\tabularnewline
\hline 
\end{tabular}
\par\end{center}
